I prefer the Burgess Supahamster Harvest (syrian) for dwarf hamsters to be honest because it has more grains than the dwarf version offers I feel. It doesn`t include millet but I add Budgie Tonic Mix and other seeds to it anyway!
I stopped using Harry Hamster for my syrian as he was bored with it and I feel it`s all large biscuits, corn and alfalfa and nothing else. I switched to Tesco`s Hamster Food (black bag) instead and he likes this. Not wholly impressed with either, but I definately wouldn`t go back to Harry Hamster again.
I particularly like the Burgess (syrian mix) because it already looks like a nice muesli variety which I can add other grains and seeds to and it works well for me. I only have a male syrian and a male roborovski at the moment and they both seem to enjoy these foods.